both candidates are vying for those votes in key battleground states. meanwhile, the running mates are preparing for their big night. paul ryan and joe biden will meet in kentucky tomorrow for their first and only vice presidential debate. there has been no shortage of advice for both men. one rule seems to be just keep it simple. >> you need to be able to see that each vice presidential candidate has hit the standard of readiness. but beyond that, unless there is a star-killing or star- catching moment, it rarely changes the course of the debate. >> in terms of substance, try not to break any new ground. this is not an audition for 2016. >> biden has been there before plenty of times. >>> and, of course, you can watch the debate right here on cbs 5. our special live coverage begins at 6:00. >>> coming up, who would steal a 200-pound headstone right off a grave? >>> thousands of people are going to live there. now a new report reveals just how radioactive the bay area development project really is. ch. >>> that relationship is something that can potenti